H4DT-30

H4DT-30 – Product Description

• The H4DT-30 is an 11-pin ON-delay electronic timer from EAPL’s H4D series.

• Provides a precise ON-delay function where the output relay is energized after a preset delay once power is applied.

• Features a large transparent dial with a red pointer for simple and accurate time adjustments.

• Compact plug-in design with an 11-pin base for quick mounting and easy replacement.

• Equipped with LED indicators for power and operation status for convenient monitoring.

Key Specifications

• Function: ON-delay timer.

• Supply Voltage: Universal supply range 24 V to 240 V AC and 24 V to 220 V DC.

• Time Range: Adjustable from 0.1 seconds to 30 minutes, set via front dial.

• Output: 2 Change-over (C/O) relay contacts, rated 5 A at 250 VAC / 28 VDC resistive load.

• Power Consumption: Approx. 5 VA (AC) or 1 W (DC).

• Accuracy:

  • Setting accuracy: ±10% of full scale.

  • Repeat accuracy: ±1%.

• Indicators: LED for power ON and relay status (UP/RUN).

• Environmental Ratings:

  • Operating temperature: –10 °C to +55 °C.

  • Storage temperature: –25 °C to +80 °C.

  • Humidity: Up to 85–95% RH at 40 °C.

• Service Life:

  • Mechanical: ≥1 million operations (no load).

  • Electrical: ≥100,000 operations at rated load.

• Insulation Resistance: >100 MΩ at 500 V DC.

• Dielectric Strength: Withstands up to 2.5 kV AC between input/output, 1.5 kV AC between relay contacts and control.

• Mounting: Plug-in 11-pin base design.

• Dimensions: Approx. 48 mm × 48 mm × 105 mm.

Applications

• Sequential motor starting to prevent high inrush current.

• Delayed startup for pumps, fans, and compressors.

• Lighting and heating systems requiring programmed ON-delay.

• DG set and transformer control panels with delay-based switching needs.

• MCC and Control & Relay (C&R) panels.

• Industrial process automation machinery needing ON-delay timing.

Summary

• The H4DT-30 is a reliable ON-delay timer with adjustable delay up to 30 minutes.

• Offers universal voltage compatibility and precise time control with a user-friendly dial.

• Compact and durable plug-in design ensures easy integration into panels.

• Ideal for MCCs, automation, DG/transformer panels, and process industries requiring ON-delay control.